The Strontium Isotope Composition of Neoproterozoic Carbonates: Implications for the Carbon Cycle and the Evolution of the Bioshpere

Project: Research project

Description

The Neoproterozoic Era (1000-542 Ma) was a time period of extreme chemical, biological and climatic change that culminated in the establishment of an environment capable of sustaining animals. These changes include massive perturbations to the geochemical cycles of C and S, multiple global-scale glaciations in the Cryogenian period (~720-635), and an oxygenation event towards the close of the era (~580 Ma) that may be linked to the evolution and diversification of Metazoa. The C isotope record of marine carbonates tracks Neoproterozoic glacial events in the form of large negative d13C anomalies that punctuate sustained intervals of high d13C. The mechanisms responsible for d13C variation through this time interval remain controversial.

The research objective of this proposal is to reconstruct the stable strontium isotope composition of Neoproterozoic carbonates in order to better understand changes in global carbonate burial rates and their relationship to massive environmental change.
StatusActive
Effective start/end date7/10/177/9/20

Funding

  • NASA Goddard Space Flight Center (80NSSC17K0245)

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strontium isotope
carbon cycle
carbonate
geochemical cycle
oxygenation
glaciation
environmental change
stable isotope
perturbation
isotope
anomaly
climate change
animal